From: Chris Lamb <lamby@debian.org>
Date: Sun, 26 Aug 2018 12:57:32 +0200
Subject: Add support for a USE_SYSTEM_LUA flag.

https://github.com/antirez/redis/pull/5280
---
 deps/Makefile |  2 ++
 src/Makefile  | 15 ++++++++++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/deps/Makefile b/deps/Makefile
index 1342fac..2ed7736 100644
--- a/deps/Makefile
+++ b/deps/Makefile
@@ -35,7 +35,9 @@ endif
 distclean:
 	-(cd hiredis && $(MAKE) clean) > /dev/null || true
 	-(cd linenoise && $(MAKE) clean) > /dev/null || true
+ifneq ($(USE_SYSTEM_LUA),yes)
 	-(cd lua && $(MAKE) clean) > /dev/null || true
+endif
 ifneq ($(USE_SYSTEM_JEMALLOC),yes)
 	-(cd jemalloc && [ -f Makefile ] && $(MAKE) distclean) > /dev/null || true
 endif
diff --git a/src/Makefile b/src/Makefile
index 51363fe..49085f2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -16,7 +16,7 @@ release_hdr := $(shell sh -c './mkreleasehdr.sh')
 uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
 uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
 OPTIMIZATION?=-O2
-DEPENDENCY_TARGETS=hiredis linenoise lua
+DEPENDENCY_TARGETS=hiredis linenoise
 NODEPS:=clean distclean
 
 # Default settings
@@ -107,7 +107,7 @@ endif
 endif
 endif
 # Include paths to dependencies
-FINAL_CFLAGS+= -I../deps/hiredis -I../deps/linenoise -I../deps/lua/src
+FINAL_CFLAGS+= -I../deps/hiredis -I../deps/linenoise
 
 ifeq ($(MALLOC),tcmalloc)
 	FINAL_CFLAGS+= -DUSE_TCMALLOC
@@ -130,6 +130,15 @@ else
 endif
 endif
 
+ifeq ($(USE_SYSTEM_LUA),yes)
+	FINAL_CFLAGS+= -I/usr/include/lua5.1
+	FINAL_LIBS := -llua5.1 $(FINAL_LIBS)
+else
+	FINAL_CFLAGS+= -I../deps/lua/src
+	DEPENDENCY_TARGETS+= lua
+	FINAL_LIBS := ../deps/lua/src/liblua.a $(FINAL_LIBS)
+endif
+
 REDIS_CC=$(QUIET_CC)$(CC) $(FINAL_CFLAGS) $(CPPFLAGS)
 REDIS_LD=$(QUIET_LINK)$(CC) $(FINAL_LDFLAGS)
 REDIS_INSTALL=$(QUIET_INSTALL)$(INSTALL)
@@ -201,7 +210,7 @@ endif
 
 # redis-server
 $(REDIS_SERVER_NAME): $(REDIS_SERVER_OBJ)
-	$(REDIS_LD) -o $@ $^ ../deps/hiredis/libhiredis.a ../deps/lua/src/liblua.a $(FINAL_LIBS)
+	$(REDIS_LD) -o $@ $^ ../deps/hiredis/libhiredis.a $(FINAL_LIBS)
 
 # redis-sentinel
 $(REDIS_SENTINEL_NAME): $(REDIS_SERVER_NAME)